importing raw data

Paolo Toffanin P.Toffanin at RUG.NL
Mon Oct 26 15:08:43 CET 2009


Did you try including also eye channels into the analysis?

Paolo

On Monday 26 October 2009 02:42:28 pm Marco Rotonda wrote:
> Hi there,
> I'm trying to import a raw data file to perform artifacting.
> The file I have is quite simple: 2 channels and only data sampled at 256.
> I did the following operations:
>
> FF = (csvread('FF.txt', 2, 0))';
> data.trial{1} = FF;
> data.time{1} = linspace(0,180,46080);
> data.fsample=256;
> data.label={'F3';'F4'};
> data.cfg.trl=[1,46080,0];
> cfg.continuous='yes';
> cfg.trl=[1,46080,0];
> cfg.channel={'F3';'F4'};
> cfg2=artifact_eog(cfg,data);
>
> but then I have the following message error:
>
> ??? Error using ==> artifact_zvalue at 202
> no channels selected
>
> Error in ==> artifact_eog at 179
>    [tmpcfg, artifact] = artifact_zvalue(tmpcfg,
>    data);
>
> What I miss?
>
> in artifact_zvalue from 197:
>
> cfg.artfctdef.zvalue.channel =
> channelselection(cfg.artfctdef.zvalue.channel, hdr.label);
> sgnind        = match_str(hdr.label, cfg.artfctdef.zvalue.channel);
> numsgn        = length(sgnind);
>
> if numsgn<1
>  error('no channels selected');
> else
>  fprintf('searching for artifacts in %d channels\n', numsgn);
> end
>
>
> So I added:
>
> cfg.artfctdef.zvalue.channel={'F3';'F4'};
>
> but I get the same error
> it seems that I need the header... but I have not.
> is it?
>
> ----------------------------------
> The aim of this list is to facilitate the discussion between users of the
> FieldTrip  toolbox, to share experiences and to discuss new ideas for MEG
> and EEG analysis. See also
> http://listserv.surfnet.nl/archives/fieldtrip.html and
> http://www.ru.nl/neuroimaging/fieldtrip.


----------------------------------
The aim of this list is to facilitate the discussion between users of the FieldTrip  toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis. See also http://listserv.surfnet.nl/archives/fieldtrip.html and http://www.ru.nl/neuroimaging/fieldtrip.
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